COD Fee is a simple add-on that allows you to set a fee for COD payment.
1. Download module, File * .zip must be uploaded in Extensions -> Extension Installer.
2. Then, press the Refresh / Clear buttons in the Extensions -> Modifications menu.
3. Go to the Extensions section and select Total Amount.
4. Click Install COD Fee module.
5. Click Edit to activate the module, set the fee, tax class, and order.
WARNING: For the functionality of the COD fee, you need to have an activated payment method Cash of Delivery.